jdgass: If you are an indie developer you should think long and hard before you dump $5 million into a sequel. Trine 3 would have needed a quarter million sales at full price to break even at launch. They've only sold 45,000 copies on Steam.
Unwritten Tales had 170,000 sales on Steam
Third game had 20,000 sales on Steam
Defense Grid 1 had 540,000 sales
Defense Grid 2 had 90,000 sales.
Risen 2 had a 1,000,000 sales.
Risen 3 had 156,000 sales.
Magicka had 3,300,00 sales
Magicka 2 had 130,000 sales
Grimrock 1 had 900,000 sales
Grimrock 2 had 150,000 sales
Both Escape Goat games have about 32,000 sales each
Anomaly 1 had 800,000 sales
Anomaly 2 had 240,000 sales
Anomaly Defenders had 24,000 sales
Stealth Bastards had 230,000 sales
Stealth Inc. 2 had 1,535 sales
Interesting numbers! The one number that I was surprised to see is Stealth Inc 2's sales. 1536? Really?! It looks like a good game, it has mostly positive reviews but it seems like nobody played it. It has only 22 reviews on Steam, none on GOG! I don't think GOG is making any money from the game (the game is on the last page of GOG's bestselling order along with soundtracks and upgrades from other games!)